1.

The solution for \(\mathop \smallint \limits_0^{{\rm{\pi }}/6} {\cos ^4}3{\rm{\theta }}{\sin ^3}6{\rm{\theta \;d\theta \;}}\) is

A. 0
B. \(\frac{1}{{15}}\)
C. 1
D. \(\frac{8}{3}\)
Answer» C. 1


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